EP1460747A1 - Bearing holder and casing of a electric motor - Google Patents

Abstract

The motor has a housing (10) with a housing body (76) accommodating a stator (62), and a flange body (46) accommodating one (44) of two rotor bearings. The flange body is carried on the housing body in an axial end position relative to the rotor shaft (14), opposing a movement transverse to the rotor shaft (14), and is fixed to oppose a movement in the direction of the rotor shaft, by means of form-fitting units, such as threads, which are coupled under relative movement of the flange body and housing body.

Description

The invention relates to an electric motor, in particular a brushless electric motor comprising a rotor, a stator, a motor housing receiving the rotor and the stator, a first bearing arranged on the motor housing on a first side of the rotor and a second side of the rotor opposite the first side Rotor arranged second bearing for rotatable mounting of the rotor around a rotor axis.

Such electric motors are known from the prior art.

The problem with these is that when assembling the motor, in particular when installing the rotor in the motor housing, it is possible to position the bearings with the necessary precision, in particular with regard to their distance in the direction of the rotor axis.

This object is achieved according to the invention in an electric motor of the type described in the introduction in that the motor housing comprises a housing body which accommodates the stator and a flange body which can be mounted on the housing body and accommodates the second bearing, and in that the flange body in an axial end position with respect to the rotor axis against movement transverse to Rotor axis is guided on the housing body and by means of the first, on Form-fitting units provided on the flange body and second form-fitting units provided on the housing body, which can be brought into operative connection by a relative movement of the flange body and housing body, is fixed against movement in the direction of the rotor axis relative to the housing body.

The advantage of the solution according to the invention can be seen in the fact that with this there is the possibility, when assembling the motor housing, of simply mounting the second bearing on the one hand on the housing body and, on the other hand, arranging it in a position required for precise bearing and guidance of the rotor relative to the first bearing.

In particular, the solution according to the invention is advantageous if the bearings are to be preloaded relative to one another with an elastic force accumulator, that is to say to be loaded in the direction of one another, and are to be mountable on the motor housing.

With regard to the design of the form-fitting units themselves, the most varied of possibilities are conceivable.

For example, the two interlocking units could be cooperating threads.

A particularly favorable solution provides that the interlocking units are designed such that they can be brought into engagement with one another by a relative movement in the direction of the rotor axis.

Furthermore, it is advantageously provided that the interlocking units are designed such that they can be fixed relative to one another by a rotational movement relative to one another about a movement in the direction of the rotor axis.

A common design of such positive locking units provides that they cooperate in the manner of a bayonet lock.

With regard to the simplest possible manufacture of such interlocking units, an advantageous solution provides that the one interlocking units are formed by track followers and the other interlocking units are formed by guideways for the track followers.

In the solution according to the invention, the interlocking units could in principle be designed in such a way that different axial end positions of the flange body relative to the housing body can be fixed with them.

However, it is particularly expedient if a single axial end position of the flange body relative to the housing body can be fixed with the form-fitting units.

It is particularly expedient if the interlocking units are designed such that the flange body can be rotated relative to the housing body in the axial end position without changing this axial end position.

In order to be able to reach the axial end position as easily as possible when assembling the flange body, the flange body can be brought into the axial end position by guide elements which are effective parallel to the rotor axis.

With regard to the arrangement of the flange body relative to the housing body, no further details have so far been given. For example, the design could be such that the flange body can be attached to one side of the housing body, for example in the manner of a cover spanning this side.

A structurally particularly favorable solution provides that the flange body can be inserted into an opening in the housing body.

In such a solution, the guide elements can be formed particularly advantageously by being formed by a lateral surface of the flange body and an inner surface of the opening facing the flange body.

In addition, there is the possibility of designing the second interlocking units in such a way that they are arranged on the opening of the housing body which receives the flange body.

The form-fit units are preferably arranged in the region of an inner surface of the opening in the housing body facing the inserted flange body.

With this solution there is also the possibility of designing the first form-fitting units in such a way that they are arranged on a side of the flange body facing the opening.

In this case, the first positive-locking units are preferably arranged on the lateral surface of the flange body.

In connection with the design of the housing body in such a way that the flange body can be inserted into an opening of the same, no further details of the function of the opening have been given so far. For example, the opening could only be an opening of a recess provided in the housing body for receiving the flange body.

A particularly expedient solution, which offers advantages particularly when assembling the electric motor according to the invention, provides that the opening is an access opening for an interior of the housing, so that the opening can simultaneously be used to access the interior of the housing body when assembling the electric motor to obtain.

In this context, it is particularly expedient if the opening in the housing body is dimensioned such that the rotor can be inserted into the motor housing through it.

In particular, if the rotor is to be supported in the motor housing by two bearings which are acted upon towards one another, in a preferred embodiment of the solution according to the invention it is provided that the second bearing is supported in the axial direction via a spring-elastic element on the flange body, so that when the axial end position of the flange body is reached, the spring-elastic element is preloaded and this preload acts on the second bearing in the direction of the first bearing.

Such a solution can be realized particularly cheaply in that the flange body has a receptacle for the second bearing, in which the second bearing can be moved relative to the flange body in the axial direction of the rotor axis.

The receptacle for the second bearing could be a receptacle additionally arranged on the flange body.

A structurally particularly simple solution provides that the receptacle for the second bearing is designed as a recess provided in the flange body.

In connection with the previous description of exemplary embodiments of the electric motor according to the invention, no further details were given of where a sensor can be arranged with which the rotary movements and rotary positions of the rotor are to be detected.

For this reason, a particularly advantageous exemplary embodiment provides that at least one sensor detecting rotational movements of the rotor is arranged on a side of the flange body facing the rotor.

Such an arrangement of the sensor improves the ease of installation of the electric motor according to the invention.

In principle, the sensor could be any type of sensor with which the rotary movements of the rotor can be detected. A particularly favorable solution provides that the at least one sensor is designed as a sensor magnet of the rotor facing the magnetic field sensor, such a magnetic field sensor being, for example, a Hall sensor or magnetoresistive sensor.

Such a sensor could, for example, be arranged on the housing body.

A particularly favorable solution provides that a sensor board with the at least one sensor is arranged on a side of the flange body facing the rotor.

Such a sensor board could, for example, be inserted into the housing body. However, it is particularly expedient if the sensor board can be rotated at least with the flange body and thus there is the possibility, by rotating the flange body, of adjusting the sensor board with respect to its rotational position relative to the stator and rotor.

The sensor board can be adjusted and positioned particularly favorably if the sensor board is firmly connected to the flange body, since the axial end position of the flange body can also be used to define the axial end position of the sensor board.

The sensor board is preferably connected to the flange body via form-locking elements.

In order to be able to arrange the sensor board as close as possible to the rotor and, on the other hand, to be able to implement a favorable mounting for the second bearing on the flange body, it is preferably provided that the second bearing is arranged on a side of the sensor board facing away from the rotor on the flange body.

The ease of installation of the electric motor according to the invention also requires that an electrical connection from the outside to the sensor board can be created in a simple manner. This can be realized particularly cheaply in that a cable leading away from the sensor board is led through a recess in the flange body.

In order to be able to introduce this cable into the recess in a simple manner when mounting the sensor board on the flange body, it is preferably provided that the recess is open to an outside of the flange body.

In the previously described embodiments of the electric motor according to the invention, nothing is said about the extent to which the flange body is fixed relative to the housing body in the axial end position after adjustment of the at least one sensor.

In order to maintain the adjustment of the at least one sensor that can be achieved, for example, by rotating the flange body, it is preferably provided that the flange body can be firmly connected to the housing body, such a fixed connection between the flange body and the housing body being able to be realized in different ways.

A particularly simple solution provides that the fixed connection between the flange body and the housing body is made by gluing. However, it would also be conceivable to provide screw connections or similar connections which permanently fix the position of the flange body in relation to the housing body.

Furthermore, no further details were given regarding the arrangement of the first bearing on the housing body. It is particularly favorable if the housing body has a bearing flange which receives the first bearing on a side opposite the flange body.

This bearing flange could in turn be mountable separately on the housing body.

However, the solution according to the invention can be implemented particularly cost-effectively if the bearing flange is integrally connected to the housing jacket of the housing body, so that when the electric motor according to the invention is assembled, an exact positioning of the second bearing relative to the housing body only has to be achieved with the measures according to the invention.

In a technically favorable version of the electric motor according to the invention it is provided that the housing body is formed from a hardened mass embedding the stator, so that the shape of the housing body itself through simple production processes, such as casting the hardening mass into a mold or injecting the hardening mass in a mold that can be made.

Fig. 1

einen Längsschnitt durch einen erfindungsgemäßen Elektromotor in zusammengebautem Zustand;

Fig. 2

eine Explosionsdarstellung des erfindungsgemäßen Elektromotors vor einem Einbau eines Rotors und eines Flanschkörpers;

Fig. 3

einen Schnitt längs Linie 3-3 in Fig. 1;

Fig. 4

eine nochmals vergrößerte Explosionsdarstellung eines Flanschkörpers vor einem Einbau eines zweiten Lagers und einer Sensorplatine und

Fig. 5

eine perspektivische Darstellung eines mit der Sensorplatine und dem zweiten Lager versehenen Flanschkörpers.

Further features and advantages of the invention are the subject of the following description and the drawing of some exemplary embodiments. The drawing shows:

Fig. 1

a longitudinal section through an electric motor according to the invention in the assembled state;

Fig. 2

an exploded view of the electric motor according to the invention before installing a rotor and a flange body;

Fig. 3

a section along line 3-3 in Fig. 1;

Fig. 4

a further enlarged exploded view of a flange body before installing a second bearing and a sensor board and

Fig. 5

a perspective view of a provided with the sensor board and the second bearing flange body.

An embodiment of a brushless electric motor according to the invention comprises, as shown in FIGS. 1, 2 and 3, a motor housing 10 in which a rotor, designated as a whole by 12, is rotatably mounted about a rotor axis 14.

The rotor 12 is formed by a rotor body 16, which is seated on a rotor shaft 18 rotatable coaxially to the rotor axis 14 and carries magnetic poles 22, 24 arranged on an outer surface 20, which are usually arranged as magnetic pole pairs on the rotor body 16, the rotor body 16 being one Inference body for the magnetic poles 22, 24 forms.

Furthermore, the rotor 12 is provided with a sensor magnetic disk 26, which in turn sits on a yoke body 28, which is also arranged on the rotor shaft 18 and is arranged, for example, in front of a rear end face 30 of the rotor body 16, with between the yoke body 28 and the rotor body 16 and the magnetic poles 24 a shield ring 32 is additionally provided.

The yoke body 28 and the sensor magnetic disk 26 have a radial extent which corresponds at most to the radial extent of the magnetic poles 22, 24 relative to the rotor axis 14.

The rotor 12 is mounted, as shown in FIG. 1, via a first bearing 34, which is held in a front bearing flange 36 of the motor housing 10 with a bearing outer ring 38, while a bearing inner ring 40 is seated on the rotor shaft 18. Furthermore, the bearing inner ring 40 of the first bearing rests on an extension 42 which extends from the rotor body 16 in a sleeve-like manner and thus also supports the rotor 12 in the direction parallel to the rotor axis 14.

Furthermore, the rotor 12 is rotatably supported on a side opposite the first bearing 34 by a second bearing 44 in the motor housing 10, which is arranged in a flange body 46 of the motor housing 10 to be described in more detail below, which is located on a side of the motor housing opposite the front bearing flange 36 10 is arranged. The second bearing 44 has an outer bearing ring 48 and an inner bearing ring 50, the inner bearing ring 50 also being seated on the rotor shaft 18. A sleeve-like extension 52 is supported on the bearing inner ring 50, which is designed, for example, as an extension 52 of the yoke body 28 of the sensor magnetic disk 26 and extends from the rear end face 30 of the rotor body 16 to the bearing inner ring 50.

Characterized in that the sleeve-like extension 52 is supported on the rotor body 16 and the rotor body 16 in turn has the sleeve-like extension 42, which rests on the bearing inner ring 40 of the first bearing 34, the bearing inner rings 40 and 50 in the direction of the rotor axis 14 are through the rotor 12 positioned at a fixed distance.

Furthermore, one of the bearings 34, 44, for example the second bearing 44, is preferably acted upon by a spring-elastic ring 54 in the direction parallel to the rotor axis 14, which is supported on the one hand on the flange body 46 and on the other hand on the bearing outer ring 48 of the second bearing 44, the For this purpose, the outer bearing ring 48 can be displaced in the direction of the rotor axis 14 in a cylindrical bearing seat 56 of the flange body 46, designed as a recess 58 (FIG. 4) arranged in the flange body 46 and open towards the rotor body 16, but always centered on the rotor axis 14, so that through the spring-elastic ring 54 both bearings 34, 44 experience a constant application of a force in the direction parallel to the rotor axis 14 and thus run essentially without play.

A stator 62 arranged around the rotor 12 is also held in the motor housing 10, the motor housing 10 preferably being formed from a hardened embedding compound 65 made of plastic, in which the stator 62 is embedded.

The embedding compound 65 also forms a housing jacket 64 which surrounds the stator 62 radially on the outside and the front bearing flange 36 which is preferably integrally formed on the housing jacket 64 with a receptacle 66 for the first bearing 34 and an opening 68 through which the rotor shaft 18 has a front end 70 protrudes.

A flange body receptacle 72 is also formed on the housing jacket 64 on a side opposite the front bearing flange 36, which receives the flange body 46 in that the flange body 46 can be inserted into an opening 74 in the flange body receptacle 72.

The flange body receptacle 72, the housing jacket 64 and the front bearing flange 36 overall form a coherent, one-piece housing body 76 which has the opening 68 for the front end 70 of the rotor shaft 18 and the opening 74 as the only openings, of which the opening 74 through which into this insertable flange body 46 can be closed, so that when the flange body 46 is inserted into the opening 74, the motor housing 10 is closed on all sides except for the opening 68.

For the power supply of windings 78 of the stator 62, winding connections 80 are provided from the motor housing 10, preferably in the area of the flange body receptacle 72, for example in the form of connecting lugs projecting beyond the flange body receptacle 72, the winding connections 80 and also running between the winding connections 80 and the windings 78 Pipes are also embedded in the flange body receptacle 72 by an investment 81 (FIG. 3).

As shown in FIGS. 1 and 2, the flange body 46 is preferably designed as a body with a cylindrical outer surface 82 which is coaxial with the rotor axis 14 and which can be applied to a cylindrical inner surface 84 of the opening 74 which also runs coaxially with the rotor axis 14 of the electric motor Flange body 46 through the outer surface 82 and the inner surface 84, both of which act as guide elements, can be inserted coaxially to the rotor axis 14 into the opening 74 of the flange body receptacle 72.

As shown in FIG. 2, the opening 74 for receiving the flange body 46, seen radially to the rotor axis 14, has a diameter such that the entire rotor 12 can be inserted through the opening 74 into an interior space 86 of the motor housing 10 from the flange body receptacle 72, whereby the front end 70 of the rotor shaft 18 can be pushed through the opening 68 in the front bearing flange 36 from the interior 86 of the motor housing 10 to the outside and thereby penetrates the bearing inner ring 40 of the first bearing 34.

To fix the flange body 46 in the opening 74 of the flange body receptacle 72, the flange body 46 is provided with first interlocking units 90 and the flange body receptacle 72 with second interlocking units 92.

The first positive-locking units 90 are, for example, pins 94 projecting radially beyond the lateral surface 82, while the second positive-locking units 92 form receptacles for the pins 94, specifically an annular groove 96 which extends in a ring around the rotor axis 14 around the opening 74 and is recessed with respect to the inner surface 84 , from which starting grooves 98 run parallel to the rotor axis 14, which on the one hand are also open to the inner surface 84 and on the other hand form an insertion opening 100 on a rear side 102 of the flange body receptacle 72, through which the pins 94 first into the insertion grooves 98 and then from the insertion grooves 98 can be inserted into the annular groove 96.

The pins 94 have an extension in the direction of the rotor axis 14 such that they lie essentially exactly between opposite side walls 104 and 106 of the annular groove 96 and thus an exact positioning in the direction of the rotor axis 14 takes place through the annular groove 96 via the pins 94 of the flange body 46 relative to the housing body 76 in its axial end position with respect to the rotor axis 14 (FIGS. 1 and 3).

The side walls 104 and 106 preferably form guide surfaces lying in mutually parallel planes 108 and 110, with the planes 108 and 110 being perpendicular to the rotor axis 14 and moving the pins 94 in the annular groove 96 - apart from the insertion process of the pins 94 into the annular groove 96 - does not result in any displacement of the flange body 46 in the direction of the rotor axis 14, so that the flange body 46 can be adjusted with respect to its rotational position relative to the flange body receptacle 72 while maintaining its axial end position relative to the rotor axis 14 (FIGS. 1 and 3).

Due to the exact axial end position of the flange body 46 relative to the housing body 76, the resilient ring 54, which is supported on an annular surface 112 of the flange body 46, can be positioned exactly such that it applies a substantially constant force to the bearing outer ring 48 of the second bearing 44 to thus hold the unit comprising the second bearing 44, the rotor 12 and the first bearing 34 with this force in the direction of the rotor axis 14 in the motor housing 10.

The rotatability of the flange body 46 relative to the receptacle 72, which is required in addition to the axial end position of the flange body 46 that is exact with respect to the rotor axis 14, is required in order to be able to position magnetic field sensors 120 on a sensor board 122 relative to the stator 62 and the rotor 12, the sensor board 122 on a The rotor 12 facing the front side 124 of the flange body 46 rests and is held in a rotationally fixed manner relative to the flange body 46 by positioning pins 126 of the flange body 46 which engage in corresponding recesses 128 in the sensor board 122.

With the flange body 46 inserted in the flange body receptacle 72, the entire sensor board 122 can thus be positioned in the axial end position in such a way that the magnetic field sensors 120 are arranged opposite the sensor magnetic disk 26 at a defined distance, and can be precisely adjusted relative to the stator 62 by rotating about the rotor axis 14. in order to exactly detect rotational positions of the sensor magnetic disk 26 and thus rotational positions of the rotor 12 relative to the motor housing 10 (FIG. 1).

In order to have sufficient installation space available on the sensor board 122, the sensor board 122 is provided with a central opening 130, through which the rotor shaft 18 extends, in order to penetrate the bearing inner ring 50 of the second bearing 44, which sits in the bearing receptacle 56, which is located extends as a depression 58 from the front side 124 into the flange body 46, so that the second bearing 44 is arranged on a side of the sensor board 122 facing away from the rotor body 16.

To make electrical contact with the sensor board 122, a flat ribbon cable 132 leads from the latter via a corresponding recess 134 in the flange body 46, which is open toward the outer surface 82, to a plug connector 136 located outside the motor housing 10.

When assembling the electric motor according to the invention, the flange body 46 is first provided with the second bearing 44, the spring ring 54 and then the second bearing 44 being inserted into the bearing receptacle 56 first. Subsequently, the sensor board 122 is mounted on the flange body 46 in a rotationally fixed manner in that the positioning pins 126 are brought into engagement with the recesses 128 of the sensor board 122 and the Sensor board 122 is placed on the front side 124 of the flange body 46 and fixed. Furthermore, the ribbon cable 132 is inserted into the recess 134 from an outside (FIG. 5).

The assembled unit of flange body 46, second bearing 44 and sensor board 122 with the magnetic field sensors 120 can be placed on the rotor shaft 18 via the opening 74 before the rotor 12 is inserted into the housing body 76 in such a way that it passes through the bearing inner ring 50 of the second bearing 44 and thus the flange body 46 is already aligned coaxially with the rotor shaft 18.

The rotor 12 can then be inserted into the opening 74 of the housing body 76 in the manner already described, whereby after inserting the rotor body 16 through the opening 74, the flange body 46 is inserted into it, which with its outer surface 82 passes through the inner surface 84 Flange body receptacle 72 is guided to the final position of the rotor axis 14 relative to the housing body 76, the pins 94 entering the insertion grooves 98 through the insertion opening 100 simultaneously with the insertion of the flange body 46 in the opening 74, in order to close the annular groove 96 via the insertion grooves 98 to reach.

By bayonet-like rotation of the pin 94 relative to the annular groove 96, the flange body 46 is fixed in its axial end position with respect to the rotor axis 14 and by further rotation of the flange body 46 while simultaneously rotating the sensor board 122, the latter together with the magnetic field sensors 120 can be moved into a certain rotational position relative to Align stator 62 in motor housing 10 without changing the position of flange body 46 in the direction of rotor axis 14. This is a final one Adjustment of the sensor board 122 by rotating the flange body 46 and finally positioning the flange body 46 relative to the housing body 76 and thus also to the stator 62.

The flange body 46 can then then be fixed in the flange body receptacle 72, for example by introducing adhesive compound 138 into a gap 140 between the outer surface 82 and the inner surface 84.

In addition, a seal can also be made in the area of the ribbon cable 132 passing through the recess 134, so that the motor housing 10 is hermetically sealed in the region of the flange body 46 and the ribbon cable 132 carried out, while at the same time permanently fixing the flange body 46 relative to the housing body 76 (FIG. 1 ).

LIST OF REFERENCE NUMBERS

10

motor housing

12

rotor

14

rotor axis

16

rotor body

18

rotor shaft

20

outer surface

22

magnetic poles

24

magnetic poles

26

Sensor magnetic disk

28

Return body

30

rear end of 16

32

shielding

34

first camp

36

front bearing flange

38

Bearing outer ring

40

Bearing inner ring

42

extension

44

second camp

46

flange

48

Bearing outer ring

50

Bearing inner ring

52

extension

54

elastic ring

56

bearing seat

58

deepening

62

stator

64

housing jacket

65

investment

66

admission

68

breakthrough

70

front end

72

Flanschkörperaufnahme

74

opening

76

housing body

78

winding

80

winding terminal

81

investment

82

lateral surface

84

Inner surface

86

inner space

90

first positive locking units

92

second positive locking units

94

spigot

96

ring groove

98

insertion grooves

100

insertion opening

102

back

104

Side wall

106

Side wall

108

levels

110

levels

112

ring surface

120

magnetic field sensors

122

sensor board

124

front

126

Pos.peg

128

recesses

130

more central Druchbr.

132

Ribbon cable

134

recess

136

Connectors

138

adhesive composition

140

gap

Claims (32)

Electric motor, in particular brushless electric motor, comprising a rotor (12), a stator (62), a motor housing (10) accommodating the rotor (12) and the stator (62), a motor housing (10) on a first side of the rotor ( 12) arranged first bearing (34) and a second bearing (44) arranged on a second side of the rotor (12) opposite the first side for rotatably mounting the rotor (12) about a rotor axis (14),
characterized in that the motor housing (10) comprises a housing body (76) receiving the stator (62) and a flange body (46) mountable on the housing body (76) receiving the second bearing (44) and in that the flange body (46) is covered in one is guided on the rotor axis (14) axial end position against a movement transverse to the rotor axis (14) on the housing body (76) and by means of first positive locking units (90) provided on the flange body (46) and second positive locking units (92) provided on the housing body (76), which can be brought into operative connection by a relative movement of the flange body (46) and the housing body (76) against a movement in the direction of the rotor axis (14) relative to the housing body (76). Electric motor according to claim 1, characterized in that the positive-locking units (90, 92) are designed such that they can be brought into engagement with one another by a relative movement in the direction of the rotor axis (14). Electric motor according to Claim 1 or 2, characterized in that the positive-locking units (90, 92) are designed in such a way that they can be fixed relative to one another by a rotational movement relative to one another about the rotor axis (14) against a movement in the direction of the rotor axis (14). Electric motor according to claim 2 or 3, characterized in that the interlocking units (90, 92) cooperate in the manner of a bayonet lock. Electric motor according to one of the preceding claims, characterized in that the one form-fit units (90) are formed by path followers (94) and the other form-fit units (92) by guideways (96, 98) for the path followers (94). Electric motor according to one of the preceding claims, characterized in that a single axial end position of the flange body (46) relative to the housing body (76) can be fixed with the interlocking units (90, 92). Electric motor according to one of the preceding claims, characterized in that the interlocking units (90, 92) are designed such that the flange body (46) can be rotated relative to the housing body (76) in the axial end position without changing this axial end position. Electric motor according to one of the preceding claims, characterized in that the flange body (46) can be brought into the axial end position by guide elements (82, 84) acting parallel to the rotor axis (14). Electric motor according to one of the preceding claims, characterized in that the flange body (46) can be inserted into an opening (74) in the housing body (76). Electric motor according to Claim 9, characterized in that an outer surface (82) of the flange body (46) and an inner surface (84) of the opening (74) facing the flange body (46) form the guide elements. Electric motor according to Claim 9 or 10, characterized in that the second positive-locking units (92) are arranged on the opening (74) in the housing body (76) which receives the flange body (46). Electric motor according to Claim 11, characterized in that the second positive-locking units (92) are arranged in the region of an inner surface (84) of the opening (74) in the housing body (76) facing the inserted flange body (46). Electric motor according to one of Claims 9 to 12, characterized in that the first positive-locking units (90) are arranged on a side (82) of the flange body (46) facing the opening (74). Electric motor according to claim 13, characterized in that the first positive locking units (90) are arranged on the lateral surface (82) of the flange body (46). Electric motor according to one of claims 9 to 14, characterized in that the opening (74) is an access opening for an interior (86) of the housing body (76). Electric motor according to Claim 15, characterized in that the opening (74) in the housing body (76) is dimensioned such that the rotor (12) can be inserted into the motor housing (10) through it. Electric motor according to one of the preceding claims, characterized in that the second bearing (44) is supported in the axial direction on the flange body (46) via a spring-elastic element (54). Electric motor according to one of the preceding claims, characterized in that the flange body (46) has a receptacle (56) for the second bearing (44), in which the second bearing (44) in the axial direction to the rotor axis (14) relative to the flange body ( 46) is movable. Electric motor according to Claim 18, characterized in that the receptacle (56) for the second bearing (44) is designed as a depression (58) provided in the flange body (46). Electric motor according to one of the preceding claims, characterized in that at least one sensor (120) detecting rotary movements of the rotor (12) is arranged on a side of the flange body (46) facing the rotor (12). Electric motor according to claim 20, characterized in that the at least one sensor is designed as a sensor magnet (26) of the rotor (12) facing magnetic field sensor (120). Electric motor according to Claim 20 or 21, characterized in that a sensor board (122) with the at least one sensor (120) is arranged on a side of the flange body (46) facing the rotor (12). Electric motor according to claim 22, characterized in that the sensor board (122) can be rotated with the flange body (46). Electric motor according to claim 23, characterized in that the sensor board (122) is fixedly connected to the flange body (46). Electric motor according to Claim 23 or 24, characterized in that the sensor board (122) is connected to the flange body (46) via form-locking elements (126, 128). Electric motor according to one of claims 22 to 25, characterized in that the second bearing (44) is arranged on a side of the sensor board (122) facing away from the rotor (12) on the flange body (46). Electric motor according to one of claims 22 to 26, characterized in that a cable (132) leading away from the sensor board (122) is guided through a recess (134) in the flange body (46). Electric motor according to claim 27, characterized in that the recess (134) is open to an outside of the flange body (46). Electric motor according to one of the preceding claims, characterized in that the flange body (46) can be firmly connected to the housing body (76). Electric motor according to one of the preceding claims, characterized in that the housing body (76) has a bearing flange (36) receiving the first bearing (34) on a side opposite the flange body (46). Electric motor according to Claim 30, characterized in that the bearing flange (36) is connected in one piece to a housing jacket (64) of the housing body (76). Electric motor according to one of the preceding claims, characterized in that the housing body (76) is formed from a hardened mass (65) embedding the stator (62).

Images